Thanks

Here is partial class:

Namespace NorthwindModel 'NOTE CASE of Namespace identifier must agree with CASE of the main Namespace identifier

<MetadataType(GetType(EmployeeMetaData))> _

Partial Public Class Employee

Public Overrides Function ToString() As String

Return LastName.ToString() & ", " & FirstName.ToString()

End Function

Private Sub OnLastNameChanging(ByVal value As String)

If (Char.IsLower(value(0))) Then

Throw New ValidationException("Lastname must begin with an upper case character")

End If

End Sub

End Class

What did I do wrong?

The demos always look great. My implementations never look anything!

I am working on a new project to build a transactional system.

I am new to Dynamic Data Websites in .NET but not new to ASP.NET.

I would like to know the pros and mostly the cons in using it in a Production website with at least 700 users and roughly 25 concurrent users at a time.

1. How does it compare, performance wise when comparing it to the usual production way of coding DAL (not LINQ to SQL) and CRUD screens in ASP.NET.

2. What are the best practices that I should use when implementing Dynamic Data website into a production website that has personnal/private information besides using SSL, forms authentication and stored procedures (to minimize SQL injection).

3. Have you seen or know of Dynamic Data websites in a production environment. Would you recommend this for a production environment with personal identifiable information?

Thank you in advance for your help!

I am working on a new project to build a transactional system.

I am new to Dynamic Data Websites in .NET but not new to ASP.NET.

I would like to know the pros and mostly the cons in using it in a Production website with at least 700 users and roughly 25 concurrent users at a time.

1. How does it compare, performance wise when comparing it to the usual production way of coding DAL (not LINQ to SQL) and CRUD screens in ASP.NET.

2. What are the best practices that I should use when implementing Dynamic Data website into a production website that has personnal/private information besides using SSL, forms authentication and stored procedures (to minimize SQL injection).

3. Have you seen or know of Dynamic Data websites in a production environment. Would you recommend this for a production environment with personal identifiable information?

Thank you in advance for your help!

When running the example under a newly installed version of Visual Studio 2010 Sp1, I was getting the "ValidationException was unhandled by user code". The exception was not being passed back to DynamicValidator class and so was not being reported back in the Browser. Searching for solutions I found work-arounds using things called ImprovedDynamicValidator and MyDynamicValidator which *did not work* and still I was getting the error message instead of the DynamicValidator response shown in the video.

Do not panic!

There is nothing wrong with either Visual Studio 2010 nor with the implementation even though it appears so.

The clue is in the error message: exception is not handled in user code. This is true. The exception handler is actually in the .NET 4.0 components which are not-in the standard install-part of the *user* code. But they are there: just press <run> again once the error message comes up and you suddenly get your expected behavior with the validation message appearing in the browser.

Wow! So what happens to a normal user? Well, try running your application through the "Debug|Start without debugging" option and suddenly everything works as expected.

But then what about debugging? Going to be a pain? And why has no-one warned us about this issue? Joe?!!! No. Actually, once a serious developer gets started with Visual Studio they are going to want to go to "Debug|Options and Settings|Debugging|General" and tick the box "Enable .NET Framework source stepping". This will automatically download and install the framework source code so that you can truely follow what is going on in the interactions between your code and the framework. Most serious developers-and certainly ones like Joe-will have installed the source code. And guess what? Suddenly the .NET Framework becomes part of the user code and the unhandled exception error disappears forever and the sample works as per the demo.

Enjoy!